CN102897951B - The method of reuse after a kind of coking wastewater deep treatment - Google Patents
The method of reuse after a kind of coking wastewater deep treatment Download PDFInfo
- Publication number
- CN102897951B CN102897951B CN201210408539.1A CN201210408539A CN102897951B CN 102897951 B CN102897951 B CN 102897951B CN 201210408539 A CN201210408539 A CN 201210408539A CN 102897951 B CN102897951 B CN 102897951B
- Authority
- CN
- China
- Prior art keywords
- waste water
- coking
- treatment
- water outlet
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention discloses the method for reuse after a kind of coking wastewater deep treatment, for conventional biochemical technique (A
2/ O) coking chemical waste water after process, adopt coagulating sedimentation, charcoal absorption and low-pressure membrane filtration combination process Treatment of Wastewater in Coking, first the coking chemical waste water after biochemical treatment enters intermediate pool; Waste water enters the top of coagulative precipitation tank by infusion, adds polyacrylamide and bodied ferric sulfate under agitation, carries out coagulating sedimentation reaction, and coagulative precipitation tank water outlet flows into the top of the absorbent charcoal adsorption tank of cylinder shape, and the residence time is 20-40min; Water outlet after charcoal absorption squeezes into low-pressure membrane filtration device by pump, and the residence time is 10-20min.The invention has the beneficial effects as follows: by the coking chemical waste water after process of the present invention, water outlet COD can reach the requirement of discharging standards, not only can preserve the ecological environment, but also has important practical significance to the Sustainable development of coal chemical enterprise.<!--1-->
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to the method for reuse after a kind of coking wastewater deep treatment.
Background technology
Along with the development of China's Iron And Steel Industry, the pollution problem of coking industry more and more obtains the attention of people, especially effective disposal of coking chemical waste water.Coking chemical waste water is the waste water produced in coal coke, gas purification and Chemicals treating process, its complicated component is changeable, except inorganic pollution beyond the region of objective existences such as ammonia nitrogen, cyanogen and thiocyanates, also containing heterocycle and polycyclc aromatic compounds such as phenols, naphthalene, pyridine, quinoline.At present, most domestic disposal of coking plant waste water system is all adopt coagulation and second-stage treatment technique.Coagulation refers to the recycling of high-concentration waste water pollutant, comprises ammoniacal liquor dephenolize, ammonia distillation, whole cold water decyanation etc.Second-stage treatment mainly refers to wastewater containing phenol and cyanide harmless treatment, based on activated sludge process, also comprises biological reinforcing technology, as Biology-iron technology, adds growth hormone method, enhanced aeration method etc.Because the composition of coking chemical waste water is very complicated, be difficult to biodegradable many rings and nitrogen heterocyclic ring aromatics containing a large amount of.The pollutents such as the COD after second-stage treatment in waste water and ammonia nitrogen are all difficult to qualified discharge, cannot meet the environmental requirement day by day improved, so generally adopt the method for setting up tertiary treatment at present.
Conventional method comprises flocculence, absorption method, membrane separation process and chemical oxidization method etc.Although adopt that coagulant sedimentation or absorption method equipment are simple, investment is saved, easy to operate, because the pollutant component in coking chemical waste water is extremely complicated, removal effect is very limited.Although and adopt membrane separation process pollutant removal fine, mould material is expensive, operating process is complicated, greatly improves cost for wastewater treatment.The organism and inorganics that present solubilised state in waste water can be converted into non-toxic substance or be converted into the form be easily separated from water by chemical oxidization method, but consumption of chemical agent is comparatively large, and transport, storage and use all exist certain danger.
In recent years due to the raising of environmental requirement, particularly the COD emission concentration in waste water was had higher requirement." Liaoning Province's provincial standard " (DB21/1627-2008) is 50mg/L to the highest permission emission concentration of the COD in waste water, and therefore traditional coking waste water treatment process is all difficult to qualified discharge.Therefore exploiting economy, efficiently Treatment of Coking Effluent process integration, have important practical significance.
Summary of the invention
For the deficiency of increasingly strict Environment Protection Policy and Technologies of Coke Plant Wastewater Treatment existence at present; the present invention discloses the method for reuse after a kind of coking wastewater deep treatment; by coagulating sedimentation, charcoal absorption and low-pressure membrane filtration combination process to coking wastewater deep treatment; this technique can effectively reduce the COD of processed waste water; realize the target of discharged wastewater met the national standard, and can lay the foundation for follow-up desalinating process.
Technical scheme of the present invention is: for conventional biochemical technique (A
2/ O) coking chemical waste water after process, adopt coagulating sedimentation, charcoal absorption and low-pressure membrane filtration combination process Treatment of Wastewater in Coking, comprise following step:
A. first the coking chemical waste water after biochemical treatment enters intermediate pool, and it can not only play the uniform object of regulating water quality, and can ensure that coagulative precipitation tank runs continuously.
B. waste water is entered the top of coagulative precipitation tank by infusion, and carry out coagulating sedimentation reaction after mixing with institute adding medicine under agitation, the adding consistency of bodied ferric sulfate is 75-125mg/L, and the adding consistency of polyacrylamide is 2-4mg/L, and sedimentation time is 40-80min.This technique mainly removes the extracellular polymeric that the dissolved organic matter that produces because of biochemical reaction in waste water and cell metabolism produce further, reduces the processing load of subsequent technique.
C. coagulative precipitation tank water outlet flows into the top of the absorbent charcoal adsorption tank of cylinder shape, the residence time is 20-40min, utilize the feature of the large and high adsorption capacity of active fruit shell carbon specific surface area, remove organic and inorganic suspended particles small in waste water, reduce the content of solvability COD class material, strengthening effluent quality.
D. the water outlet after charcoal absorption squeezes into low-pressure membrane filtration device by pump, and the residence time is 10-20min.Low-pressure membrane adopts high reactivity filamentary material, and its surface by extremely small species adsorbs, can have removal effect to the Persistent organic pollutants in coking chemical waste water usually.
By above-mentioned three kinds of technique synergies, enhance the removal effect to hardly degraded organic substance, reduce effluent COD concentration, not only achieve discharged wastewater met the national standard but also provide condition for follow-up desalting treatment.
The invention has the beneficial effects as follows: provide a kind of coagulating sedimentation, charcoal absorption and the low-pressure membrane filtration combination process method as advanced treatment on coking wastewater.Waste water is after process of the present invention; water outlet COD can reach the requirement of the emission standard of " Liaoning Province's provincial standard " (DB21/1627-2008); not only can preserve the ecological environment, but also the Sustainable development of coal chemical enterprise is had important practical significance.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of embodiment of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
Embodiment 1
Coking chemical waste water after biochemical treatment in equalizing tank enters coagulative precipitation tank by infusion, pharmacy response under the state stirred, bodied ferric sulfate 75mg/L, polyacrylamide 2mg/L, and sedimentation time is 40min; Coagulative precipitation tank water outlet flows into absorbent charcoal adsorption tank, and adsorbent hydroxyl aluminum is 20min; Absorbent charcoal adsorption tank water outlet squeezes into low-pressure membrane filtration device by pump, and hydraulic detention time is 10min, and the water outlet of low-pressure membrane filtration device is the coking chemical waste water after advanced treatment.
Embodiment 2
Coking chemical waste water after biochemical treatment in equalizing tank enters coagulative precipitation tank by infusion, pharmacy response under the state stirred, bodied ferric sulfate 100mg/L, polyacrylamide 3mg/L, and sedimentation time is 60min; Coagulative precipitation tank water outlet flows into absorbent charcoal adsorption tank, and adsorbent hydroxyl aluminum is 30min; Absorbent charcoal adsorption tank water outlet squeezes into low-pressure membrane filtration device by pump, and hydraulic detention time is 15min, and the water outlet of low-pressure membrane filtration device is the coking chemical waste water after advanced treatment.
Embodiment 3
Coking chemical waste water after biochemical treatment in equalizing tank enters coagulative precipitation tank by infusion, pharmacy response under the state stirred, bodied ferric sulfate 125mg/L, polyacrylamide 4mg/L, and sedimentation time is 80min; Coagulative precipitation tank water outlet flows into absorbent charcoal adsorption tank, and adsorbent hydroxyl aluminum is 40min; Absorbent charcoal adsorption tank water outlet squeezes into low-pressure membrane filtration device by pump, and hydraulic detention time is 20min, and the water outlet of low-pressure membrane filtration device is the coking chemical waste water after advanced treatment.
Test by analysis, the coking chemical waste water COD after this invention process is less than 50mg/L, and volatile phenol is less than 0.1mg/L, and petroleum-type is less than 2mg/L, and ammonia nitrogen is less than 8mg/L, and TOC is less than 20mg/L, and occurrence is as shown in table 1.Process for Effluent water quality reaches the requirement of " Liaoning Province's provincial standard " (DB21/1627-2008), and can provide condition for the application of follow-up desalinating process.
The each embodiment of table 1 is to the removal effect of pollutent
Claims (1)
1. a method for reuse after coking wastewater deep treatment, is characterized in that, for conventional biochemical technique A
2coking chemical waste water after/O process, adopt coagulating sedimentation, charcoal absorption, low-pressure membrane filtration combination process Treatment of Wastewater in Coking, the waste water COD after process is less than 50mg/L, volatile phenol is less than 0.1mg/L, and petroleum-type is less than 2mg/L, and ammonia nitrogen is less than 8mg/L, TOC is less than 20mg/L, and concrete steps are as follows:
A. first the coking chemical waste water after biochemical treatment enters intermediate pool;
B. waste water is entered the top of coagulative precipitation tank by infusion, add polyacrylamide and bodied ferric sulfate under agitation, carry out coagulating sedimentation reaction, the adding consistency of bodied ferric sulfate is 75-125mg/L, the adding consistency of polyacrylamide is 2-4mg/L, and sedimentation time is 40-80min;
C. coagulative precipitation tank water outlet flows into the top of the absorbent charcoal adsorption tank of cylinder shape, and the residence time is 20-40min;
D. the water outlet after charcoal absorption squeezes into low-pressure membrane filtration device by pump, and the residence time is 10-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408539.1A CN102897951B (en) | 2012-10-23 | 2012-10-23 | The method of reuse after a kind of coking wastewater deep treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408539.1A CN102897951B (en) | 2012-10-23 | 2012-10-23 | The method of reuse after a kind of coking wastewater deep treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102897951A CN102897951A (en) | 2013-01-30 |
| CN102897951B true CN102897951B (en) | 2016-04-06 |
Family
ID=47570487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210408539.1A Active CN102897951B (en) | 2012-10-23 | 2012-10-23 | The method of reuse after a kind of coking wastewater deep treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102897951B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723853B (en) * | 2013-12-04 | 2015-08-26 | 江苏双净净化科技有限公司 | Gas generating station intermittent type total system and treatment process thereof |
| CN105384279B (en) * | 2015-12-09 | 2019-04-05 | 大唐国际化工技术研究院有限公司 | A kind of processing system and processing method of the waste water that SCR denitration regeneration generates |
| CN105502737B (en) * | 2015-12-09 | 2019-04-05 | 大唐国际化工技术研究院有限公司 | A kind of processing system and processing method of the waste water that SCR denitration regeneration generates |
| CN107381879A (en) * | 2017-09-05 | 2017-11-24 | 浙江大学宁波理工学院 | A kind of method for handling gasification of biomass gas washing wastewater and recycling wastewater treatment product |
| WO2022083071A1 (en) * | 2020-10-22 | 2022-04-28 | 麦王环境技术股份有限公司 | Deep purification device and process for non-degradable organic wastewater |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958486A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨工业大学 | Advanced treatment method for carbonization wastewater |
-
2012
- 2012-10-23 CN CN201210408539.1A patent/CN102897951B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958486A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨工业大学 | Advanced treatment method for carbonization wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 混凝-吸附法处理焦化废水的研究;袁苍霞;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑（月刊）》;20120315;第2、22、42页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102897951A (en) | 2013-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105585220B (en) | A kind of urban sewage treatment system and purification method | |
| CN101597119B (en) | Integrating technology of water supplying and saving and sewage reusing technology system in petroleum and petrochemical industry | |
| CN107555641B (en) | Pretreatment method of coking wastewater | |
| CN103011533B (en) | Pharmaceutical chemical wastewater treatment device and treatment method thereof | |
| CN107117767B (en) | Petrochemical wastewater treatment method | |
| CN101701025B (en) | Method for extracting humus acid from concentrated waste percolate and treating waste water | |
| CN106927628A (en) | Light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique | |
| CN101698550A (en) | Advanced treating method of landfill leachate | |
| CN102897951B (en) | The method of reuse after a kind of coking wastewater deep treatment | |
| CN204779148U (en) | Coking wastewater advanced treatment and recycling system | |
| CN102583879A (en) | High-concentration integrated chemical organic wastewater treatment process | |
| CN204550325U (en) | Sewage from oil refinery treatment system | |
| CN101659502A (en) | Method for treating waste leachate by utilizing high denitrification shared type Orbal oxidation ditch | |
| CN104211267A (en) | Method for treating organic pigment waste water containing high ammonia nitrogen and salinity | |
| Yu et al. | Integrated treatment of municipal sewage sludge by deep dewatering and anaerobic fermentation for biohydrogenproduction | |
| CN104310710B (en) | A kind of coal chemical wastewater treating technique | |
| CN207243564U (en) | A kind of efficiently A2O waste water control integration apparatus | |
| CN102887612A (en) | Coal chemical industrial wastewater treating and recycling method combined with coal dressing process | |
| CN106630418B (en) | Industrial wastewater treatment process | |
| CN109607935B (en) | Method for removing heavy metals in coking wastewater | |
| CN104926048A (en) | Treatment method for waste water in coal chemical industry | |
| CN104556459A (en) | Method for reusing deeply treated coking wastewater | |
| CN201999832U (en) | Treatment device for treating high-salinity, non-biodegradable toxic industrial wastewater | |
| CN104724881A (en) | Treatment method for high salinity industrial wastewater | |
| CN107721111A (en) | A kind of system and method for mud decrement processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |